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[texts]73 Magazine (March 1980)
73 Magazine March 1980 (#234) Good-Bye to Autopatch Hassles - low-cost remedies to common problems ...... WB2LEI/4 30 Baudot-ASCII Converter Follow-Up - add a FIFO buffer for typing ease ...... VE4YD, VE4CM 34 CB to 10 - part XXII: more talk power for the TRC-11 ...... N4APN 38 The L With It - an alternative to the variable inductor ...... K4KI 40 Future Rig and Rigamarole - are you ready for faster-than-light propagation? ........
Downloads: 2,822
[texts]73 Magazine (July 1981)
73 Magazine July 1981 (#250) Dayton Dilemma '81 - which new gear do you buy? ...... KA1LR 22 The Fun-Ceiver - easy-to-build companion to February's QRP Fun-Mitter ...... WA0RBR 32 Review: The Kenwood TS-130s - a good rig done better ...... KA1LR 38 Review: The NCG-15 SSB/CW Monoband Transceiver - moving tale of mobile hamming ...... KA1LR 42 The Incredible Shrinking Antenna - give your vertical a top hat ........
Downloads: 2,532
[texts]73 Magazine (October 1979)
73 Magazine October 1979 (#229) Extremely Low Frequency Radiation: Cause for Worry? - studies on ELF are inconclusive, but the battle is joined ...... WB2NEL 34 An LED Display for the HW-2036 - eliminates unwieldy thumbwheel switches ...... WA4BZP 36 It's a Wattmeter... It's an Swr Bridge.. It's Swattmeter! - a super home-brew project ...... K4LBY 42 The Double-Sawbuck QRM Annihilator - 3-IC circuit yields perfect CW ........
Downloads: 3,595
[texts]73 Magazine (July 1980)
73 Magazine July 1980 (#238) The Rites of Spring - Dayton does it again ...... N1AUI, WB8BTH, KA1HY 30 One Step at a Time: Designing Your Own Ham Gear - part II ...... W4RNL 36 Top-Banding the DX-60B - put a classic rig on a classic band ...... WB1ASL 44 Forward into the Past! - a solid-state restoration project for a vintage BC receiver ...... W5JJ 48 ADDSCAN - now you can be two places at once ........
Downloads: 3,189
[texts]73 Magazine (September 1986)
73 Magazine September 1986 (#312) A Rotatable What? - How to spin 90 feet of crank-up tower on a lazy susan ...... WA2VUN 28 HF Antennas: All Bands, All Wire - Another round in the crusade against coax—these three 9-band doublets contain no artificial ingredients ...... W0VM 32 Watts My Line - Coax, parallel feeders, or microstrip, this Basic program lets you design your own custom transmission line ........
Downloads: 1,660
[texts]73 Magazine (June 1995)
73 Magazine June 1995 (#417) The N4UAU Super CW Station - This li'l gizmo does it all! ...... N4UAU 10 Collinear 5/8 - Wave Omni Antenna for 2 Meters - Commercial antenna performance at a home-brew price! ...... WD0O 18 Battery Monitor and Charge Controller - Check the voltage and keep the battery charged ...... K4GOK 32 An Inexpensive Morse Code Keyer - Build your own for under 10 bucks ...... N2YMW 36 Measuring the Antenna from the Shack - The half-wave length feedline and how to get it ........
Downloads: 2,482
[texts]73 Magazine (March 1978)
73 Magazine March 1978 (#210) The New, Improved "Best Keyer Yet" - updating MINI-MOS ...... K4JEM 22 The Powerful Grounded Antenna - thrives on poor soil ...... W0SII 26 How To Cut Costs On Power Supplies ...... W9HDA 28 You, Too, Can Go Digital ...... K2RB 32 Old Receivers - A Hidden Gold Mine - updating those '405 receivers ...... W6GXN 36 Old Rigs Can Live Again! ...... K41PV 40 Novices, Paddle Your Way To Happiness - super deluxe Novice keyer ........
Downloads: 2,074
[texts]73 Magazine (September 1989)
73 Magazine September 1989 (#348) Vertical Antennas at HF: Part I - The inside story on vertical antennas ...... W1GV 38 Build a 30 Meter Trap - Modify your Cushcraft AV-4 or AV-5 for this WARC band ...... KE0UV 11 Unique 12 and 17 Meter Dual-Band Beam - Build this for an 8 dBd signal! ...... W6YUY 20 Kaboom Micro Keyer - For safe mobile CW operation ...... KB1UM 28 3/4 Inverted "U" for 160m - Big signal on the Top Band ........
Downloads: 1,696
[texts]73 Magazine (May 1979)
73 Magazine May 1979 (#224) CB to 10 - part XVIII: several PLL rigs ...... K9PS 30 PROM IDer for Longer Callsigns - don't be caught short ...... W4VGZ 34 The W7GAQ Key Collection - 250 museum masterpieces ...... K7NZA 38 Proper FM Transceiver Adjustment - good club project ...... VE3AVY 44 Dual-Band Smokey Detector - Super Scooper does it all ...... W1SNN 48 The DXer's Secret Weapon - costs you nothing ........
Downloads: 3,319
[texts]73 Magazine (April 1987)
73 Magazine April 1987 (#319) Dayton Digest - If you haven't been to the Dayton Hamvention, you haven't been to a hamfest ...... WA4BPI 32 QRP Antenna Farming - Work the world from a small lot with a few Watts ...... W0VM 36 The Cellular Phony Antenna - A two-meter mobile antenna with a twist ...... WA2AJQ 38 Weatherproofed Antennas - Stop ripping apart your antennas every year in the name of "maintenance" ........
Downloads: 2,573
[texts]73 Magazine (October 1982)
73 Magazine October 1982 (#265) The Splattometer - visual overmod warning ...... W1BG 10 Digital Basics - part II ...... K4IPV 20 Dissertation Upon Roast Pig - the ultimate in surplus? ...... N6TO 28 Got an Apple? Want RTTY? - try this hard-core interface ...... WB6FBN/4 34 The Pleasures and Perils of Crankup Towers - don't lose your head! ...... K4TWJ 40 The Incredible Antenna Mark 2 - a complete HF allbander in a very small space ........
Downloads: 2,414
[texts]73 Magazine (October 1984)
73 Magazine October 1984 (#289) Find Fault with Your Coax - Is your cable really doing its job? Find out with this elegant detective method ...... K4IPV 10 The Aussie Parasol Beam - What has twelve corners, three bands, and uses 140 feet of wire? Hint: It's not a quad ...... W6TYH 20 The Incredible Broadband Bowtie - Truly designed for solid-state finals, this 75m antenna features 50 Ohms at the feed-and less than 1.5:l swr across the band ........
Downloads: 2,618
[texts]73 Magazine (September 1983)
73 Magazine September 1983 (#276) "10... 9... 8..." - Be ready when the Space Shuttle Columbia carries aloft the first astro-ham. Here's the best way to contact this historic DXpedition ...... WA6ITF 8 Join the Packet-Radio Revolution - Get error-free, high-speed communications -Packet radio's chief architect, WA7CXD, explains what it is and how it works ...... WA7GXD 16 Be a RTTY Rembrandt - Put that award-winning shine on your RTTY pix with these tips from a RTTY artist's sketchbook ........
Downloads: 1,761
[texts]73 Magazine (December 1981)
73 Magazine December 1981 (#255) Cold Comfort - an HT to the rescue at fifteen below ...... KA1D 12 Review: The Rex Bassett TLM-2 Mobile Mount - banish your fear of flying ...... KAlLR 18 Update Your CW Music Keyboard - play it again Sam ...... K5KL 20 Review: The Kenwood TR-7730 Transceiver - Let's get small ...... KA1LR 26 Joe Ham: The Consumer - do you fit the mold? ...... N6AVU 32 Bob Cooper: Profile of a Pioneer ........
Downloads: 2,601
[texts]73 Magazine (August 1978)
73 Magazine August 1978 (#215) Radio Row Revisited - it's alive and well in Tokyo ...... W8JJO 26 How To Work Europe With An HT - hint: requires trans-Atlantic plane fare ...... WB9PYM 28 What? CB Repeaters?! - perfectly legal, too ...... WA4EOX 34 A Complete X-Band Transmitter - easv to build ......W1SNN 38 Shock!!! - what to do when Thor's hammer falls ...... McAlister 44 The PVC Portable - a "go anywhere" 2m ground plane ........
Downloads: 2,118
[texts]73 Magazine (December 1997)
73 Magazine December 1997 (#447) Distributed Capacity Folded Loop - This ceiling-mount antenna will really go to your head! ...... W6NBC 10 How to Silverplate RF Tank Circuits - A simple and inexpensive process to reduce losses ...... WB2CQM 18 Build Your First Kit! - Just follow one hams simple advice ...... N0BLX 24 Limited Space Antenna - Short of real estate? This might help! ...... HL9BK/K2KSY 27 How to Build A Great Ham Club - Good advice from the PR master ........
Downloads: 3,575
[texts]73 Magazine (October 1977)
73 Magazine October 1977 (#205) Communicate On 10.25 GHz - with a simple transceiver ...... WA3ETD 26 Home Brew Tilt-Over - the water pipe special ...... W4MEA 30 Minimize Feedline Loss - UHF buffs, front end center! ...... W2STM 32 How About 6 FM? - it's easy with a modified HE-50 ...... W3KBM 34 W.A.S. -Easily! - catching the last few ...... W7FGD 38 Fool the Wire Wizard - a computer would have helped ........
Downloads: 2,622
[texts]73 Magazine (December 1979)
73 Magazine December 1979 (#231) New Product: Swan's Astro 150 SSB Transceiver ...... WB8BTH 32 Low-Cost Receiver for Satellite TV - this modular design uses readily available technology ...... N6TX 38 A Simple 2m/10m Crossband Repeater System - work the world with an HT! ...... K9EID 44 Audio Booster for Mil-Surplus Receivers - a must for headphone haters ...... McClellan 50 Working with FETs - part II : experiments with gain and supply voltage ........
Downloads: 2,668
[texts]73 Magazine (December 1988)
73 Magazine December 1998 (#459) Probing Auto Electronics - Help your neighbor identify his car's problem and be an electronic's hero! ...... W6WTU 10 Announcing the QRPeanut - Here's a compact QRP transmatch you can build for next to nothing ...... N5GZH 14 Keys to Better Operating - Yes, much of it is common sense ...... W6BNB 17 Electronic Bug Emulator - Put some personality back into your CW ........
Downloads: 2,158
[texts]73 Magazine (November 1982)
73 Magazine November 1982 (#266) A Perfect "10" - Timer, counter, logic probe - 10 functions in all. That's the Multi-Board One and you can build it ...... WA2BHB 10 Remote Control Your IC-701 - Simpler than commercial controllers, this home-brew circuit nevertheless features push-button band changing and frequency selection scanning, and expanded coverage ...... N2GW 14 Automatic Beam Aimer - Here is the scoop on adding set-and-forget convenience to your rotator control...
Downloads: 2,728
[texts]73 Magazine (June 1978)
June 1978 (#213) Happiness Is Being A Ham Manufacturer - 73 visits Cushcraft ...... W2NSD/l 30 Extended Double Zepp - old-timer's delight still works ...... W6TYH 34 New Dipole Feeder - tuned feeders, yet! ...... AA6AX 38 The Cliff-Dweller's Delight - how to operate from an apartment ...... WA2UVC 40 Wait Till You Try 16 Elements! - 15dB gain on 2m is a real kick ...... WA8FCA 42 Working 15m With A 20m Beam - by adding three more elements ........
Downloads: 1,972
[texts]73 Magazine (February 1995)
73 Magazine February 1995 (#413) Dual Bi-Square Loop for HF - Try this easy, low-cost approach on 20 and 2 meters ...... K5DKZ 18 Reading Morse Code on Your PC - Decipher Morse code right off the air, or improve your own fist ...... W6PRO 22 Cheap Dual-Band Yagi - A fine VHF/UHF beam made from old TV antennas ...... KA0NAN 46 Grounding and Lightning Protection, Part 1 - Protect your shack and yourself from lightning ........
Downloads: 1,689
[texts]73 Magazine (February 1992)
73 Magazine February 1992 (#377) The Copper Cactus J-Pole - For 2m and 70cm ...... KE7AX 9 A Five-Component Wideband Amplifier for Your Receiver - Give your VHF receiver a boost! ...... K9EYY 12 An NE-602 RF Signal Generator - Useful test equipment from a versatile IC ...... Kerr 22 Colombian Expedition - Adventure in the Andes ...... KC4VLN 34 PVC Cubical Quad for 10 Meter -Build this $30 plumber's special! ........
Downloads: 1,805
[texts]73 Magazine (September 1982)
73 Magazine September 1982 (#264) Micro Modem - a RTTY TU designed for computers ...... WA4CKQ 10 F1 for the Hot Water 101 -all the way with FSK! ...... K0JH 20 No-Frills RTTY - $2OO and you're on the air ...... WA4STO 24 Incredibly Simple RTTY - receive it on your TRS-40 ...... WQXI 28 The RTTY/Tri-bander Marriage - enjoy the 100% duty cycle ...... K0ARC 32 Confessions of a Counter Evolutionary - part II ........
Downloads: 3,488
[texts]73 Magazine (March 2001)
73 Magazine March 2001 (#484) Way Cool Rocket Project: Part 2 - This 70cm rocketborne radio telemetry system is strictly for kids -Not! ...... N4XVF 10 Build Yourself an NVIS - If you want to talk to the guy in the next county on HF, of course ...... VE2EQL 18 Inside Digital TV/VCR Tuners - Part 7: Conclusion ...... W6WTU 19 Build This Variable AC Bench Supply - If you can find a Variac transformer, that is ........
Downloads: 2,245
[texts]73 Magazine (July 1977)
73 Magazine July 1977 (#202) Motorcycle Mobile ...... WA4LWY 40 Inside the Bird ...... W6YUY 44 Introducing Autotrak! ...... W9CGI 46 A Battery Voltage Monitor ...... Hawkinson 52 The Morse Clock ...... WA1MXV 54 Hunting Noise ...... W6RVP 58 CMOS Oscillators ...... WB5DEP 60 A Dial for the FM-DX ...... W2PQG 63 Robot 400 Scan Converter Details ...... WB8DQT 64 Bounceless TT Decoder ...... WA5ACA 71 Hams Profit From CB ........
Downloads: 2,212
[texts]73 Magazine (December 1984)
73 Magazine December 1984 (#291) A Times Square Data Display - Build this scrolling touchtone decoder for your favorite repeater. What you see is what you hear ...... WA4TEM 8 Color Computer SSTV: Part II - Complete the picture by adding weather-satellite facsimile to your new color SSTV system ...... K6AEP, WB8DQT 18 Transistors: A Biased Approach - In Part I, KC0EW takes the mystery out of solid state with clear talk and practical examples ........
Downloads: 2,183
[texts]73 Magazine (October 1990)
73 Magazine October 1990 (#361) Dual Voltage Bench Supply - Versatile solution for your power supply needs ...... W6WTU 10 The SPC Transmatch - Improved performance for 20 through 10 meters ...... W4RNL 22 ROBO-COPY - Automate your shack with a CW copier ...... WB9DYI 28 An Easy to Make 2 Meter Antenna - Make a strong J-Pole from an old TV antenna ...... AA5KB 32 Solar Car Race - Searching for an alternative ........
Downloads: 2,017
[texts]73 Magazine (April 1978)
73 Magazine April 1978 (#211) Ecstasy In Multimeterland - build this autoranging marvel ...... WA4AIH 24 How To Succeed On 1296 - cat-food can 50-Watt amplifier ...... W4UCH/2 32 How Do You Use ICs? - part IX ...... WA2SUT/NNN0ZVB 44 You're Still Using Tubes? Yeccch! ...... W6HPH/G5AWI 50 The Challenge Of 10.5 GHz - use it or lose it to Smokey ...... W1SNN/WR1AFE 60 In Search Of the Ultimate - an incredible counter calibrator ........
Downloads: 2,070
[texts]73 Magazine (March 1979)
73 Magazine March 1979 (#222) RAM Scan Your KDK - amazing flexibility for $30 ...... WB2JHN 26 The NCX-Match - build something useful ...... WA6NCX/l 32 The Memorizer Goes to MARS - expanded frequency coverage ...... KH6JMU 38 Build a Hybrid Capacity Meter - digital circuitry, analog display ...... WA4HUU 40 Power Plus! - a 20-Amp, adjustable, regulated dc supply ...... W6YUY 42 Reaching for the Top - why stop with the General ticket? ........
Downloads: 2,439
[texts]73 Magazine (August 1982)
73 Magazine August 1982 (#263) Poor Man's Spectrum Analyzer - another 73 breakthrough ...... WB5IPM 10 The AC4YN Story - a Tibetan adventure, circa 1936-1937 ...... G5YN 32 "Smart" Squelch for SSB ...... W9MKV, W9YAN 44 The Ultimate Fuse - ac overload protection ...... W2OLU 52 Multi-Purpose Peak Adapter - don't settle for being average ...... K9EUI 54 The $100 TVRO Receiver - Satellite Central, part VIII ........
Downloads: 3,295
[texts]73 Magazine (January 1988)
73 Magazine January 1988 (#328) Welcome, Newcomers! - Let's talk about it! ...... KA1HY 4 Working the World Fast - Heed this advice and you can't miss ...... N6HYK 11 W87PAX: DXing from the Pan American Games - A record-breaking success ...... KA9OIH 14 Troubleshooting Tricks #1 - The road to repair is easier than you think ...... Harshbarger 26 The Colvins - DXing is the life for Lloyd and Iris ........
Downloads: 1,541
[texts]73 Magazine (July 1979)
73 Magazine July 1979 (#226) A Visit to Antenna Specialists - Wayne tours the test range ...... W2NSD/1 30 Secrets of Guyed Towers - put 'em up and keep 'em there ...... WB3BQO 34 Death-Defying PL Mod for the KDK 2015 - not for the squeamish ...... W8GQL 40 Feed-Horn Mounting Made Easy - solution to a pesky problem ...... WB8DQT 44 Antenna Tuning Joy Revisited - remember the Tektronix 190B? ...... W9CGI 48 Modern Solid-State Equipment Design: A Better Way - sorry, tube fans ........
Downloads: 2,183
[texts]73 Magazine (November 1976)
73 Magazine November 1976 (#193) Cordless Iron Tips - when you're up against the Wahl ...... K9POX 26 Bicycle Mobile - cover feature ...... WB4SNC 30 Build a Simple "Lab" Scope - costs less than $70! ...... K8JWR 32 Get on Six with Surplus - the el cheapo RT-70 is a natural ...... WA5HLE 40 The Beam Saver - rotor memory system ...... W6YUY 46 Updated Universal Frequency Generator - extremely versatile test unit ........
Downloads: 1,966
[texts]73 Magazine (October 1992)
73 Magazine October 1992 (#385) Packet on the Mac - Connect with the world without a TNC ...... KD6CMT 8 A 2 Meter FET Amplifier for Your Handheld - Build this simple, inexpensive amplifier ...... AA4AW 20 A New Look at Loop Antennas - Adding regeneration to ferrite-core and open-wire box loops ...... W2IMB 28 Baby Loopy - A half-wave, inductively-loaded loop ...... NH6XK 34 Noise Reduction Using Broadband Active Whip Antennas - Clear reception for the VLF/LF bands ........
Downloads: 2,632
[texts]73 Magazine (April 1989)
73 Magazine April 1989 (#343) Hamfest Survival Guide - Tips on how to more wisely shop for hamfest gear ...... WB9IVR, AA4QA 20 Stay With the State Of The Art - Keep in the know without blowing your budget ...... W1UO 52 Powerful Crystal Set - Better reception on a classic no-power rig ...... Haas 12 Quick and Easy 2m/440 MHz Antenna - Ideal for your dual-band HT -and costs pennies to build! ........
Downloads: 1,666
[texts]73 Magazine (August 1975)
73 Magazine August 1975 (#179) The Oscar Zapper ...... WB4VXP 12 Identalert C ...... K2PMA 22 Digital SWR Computer ...... K2OAW 25 RF Feedback, The Experimenter's Curse ...... K1CLL 36 Surveying the DVM Scene ...... W9KXJ 42 How About a Weather Satellite Monitor? ...... WB8DQT 45 The QRP Accu-Keyer ...... WA5KPG 58 Catenary Suspense ...... W1BNN 62 Copper Rip-Off ...... W7SHY/6 69 Better Results from those Sweep Tubes ........
Downloads: 1,917
[texts]73 Magazine (December 1969)
73 Magazine December 1969 (#111) Quick, Easy, Dependable Transistor Diode Checker - For those who like checkered diodes ...... W6ICC 6 Did Samuel Morse Really Invent the Telegraph? - Telegraph? What's that? ...... W2FEZ 10 Combination Dummy Load/Attenuator Network - Also doubles as a hot plate for your coffee warming ...... W2EEY 14 Tuned Filter Chokes - The Easy Way - Can your filter chokes carry a tune? ........
Downloads: 2,732
[texts]73 Magazine (April 1980)
73 Magazine April 1980 (#235) Sunspots... What Do They Mean? - your guess is as good as mine ...... G3WDI 32 More on Jammer Nabbing - hints on equipment and strategy ...... WB0CMC 36 Cheapy Scanner for the Memorizer - is $5 cheap enough for you? ...... WA2ORU 38 Back to School - we can still learn a thing or two about basic electricity ...... W6HDM 40 Moving Display ASCII Readout - works with UARTs, keyboards, and micros ........
Downloads: 2,150
[texts]73 Magazine (March 1982)
73 Magazine March 1982 (#258) The Porta-Peater The Instant Communicator - quick and easy does it ...... WA2BHB, AC2A, WA2UNN 12 Amateur Television's Stripper - a home-brew star ...... VE3CYC 20 Polishing Kenwood's R-1000 - a gem in the rough ...... K9EUI 34 Peaking and Tweaking Surplus CB Boards - the untold story ...... WB0NPN/8 38 OSCAR Pathfinder - a colorful way to track the satellites ...... WB6NQK 46 Which TVRO Antenna Is Best? - Satellite Central, Part IV ........
Downloads: 2,760
[texts]73 Magazine (May 1977)
73 Magazine May 1977 (#200) Build the World's Simplest Keyer - uses 555 timers ...... Ring 46 Stop That Autostart - mods for the ST-6 circuit ...... WA5EVH 47 Predict the Weather! - a complete satellite receiver ...... WB8DQT 48 Learn A New Language - try CW ...... WB0KTH 52 The History of Ham Radio - part III ...... W9CI 54 The Oily Resistor Watteter - how to put 20 W into a 1 W resistor ...... WA1PDY 57 SSTV Slalom Game - you don't need a sports car ........
Downloads: 1,959
[texts]73 Magazine (February 1979)
73 Magazine February 1979 (#221) Five-Chip Auto IDer - in case you forget ...... Bartholomew 28 The Vacationer - B&W's portable antenna ...... WA2ALT 29 Tone Decoder Improvements - another step toward perfection ...... WA1LMV 30 The All-Wrong Power Supply - works in spite of itself ...... WA3EEC 32 The Hardhearted Rf Detector -insensitive to harmonics ...... N4ES 33 Custom-Designed Power Supplies - try the 723 ........
Downloads: 2,244
[texts]73 Magazine (December 1993)
73 Magazine December 1993 (#399) Deluxe Communications Audio Board - Enhance your audio with this practical add-on ...... WD4PLI 10 Resolving 2 Meter/Cable TV Interference - A winning strategy for keeping the peace, and staying on the air! ...... NM8R 18 Five-Element T-Match VHF Yagi - Excellent performance characteristics on 2 meters ...... KA0NAN 28 Remote Tuned Active Antenna - Tune this easy amplified antenna without leaving your chair ........
Downloads: 2,543
[texts]73 Magazine (August 1980)
73 Magazine August 1980 (#239) The Soft Mount -mobile mounts enter the space age ...... W2QFC 32 Notes from Big Sky Country - the further adventures of Dr. Hess ...... W6CK 36 Meet the Little Giant - everyman's sheet-metal tool ...... K4JHN 46 On Ten FM - home of the free, land of the brave ...... WB2EQG 52 The Rains of Morvi - duty in disaster for Indian hams ...... VU2ST 60 Those Fabulous Fifties - an era in retrospect ........
Downloads: 1,690
[texts]73 Magazine (November 1981)
73 Magazine November 1981 (#254) The Satellite TV Challenge - 73 magazine's answer ...... N8RK 14 Space Spinoffs for Amateur Radio - the makings of a communications revolution ...... WA1DCP, W2IKQ 18 How Big A Dish? - Satellite central, part 1 ...... Gibson 20 Satellite Channel Guide - Part 1 ...... WESTSAT 24 Satellite TV Receivers - is there a better way? ...... K4TWJ 26 Spread Spectrum - a report from AMRAD ........
Downloads: 1,979
[texts]73 Magazine (December 1983)
73 Magazine December 1983 (#279) Code Practice: Have You Seen the Light? - This simple cpo is the best weekend project under the sun -or bulb ...... Davidson 10 Unlimited Guarantee for Power Supplies - Plan for the worst and you'll get the best, says KC0EW. He might be right ...... KC0EW 20 PC Boards in a Flash! - Make circuit boards without expensive equipment. All you need is a light and a fast switch hand ........
Downloads: 2,665
[texts]73 Magazine (April 1963)
73 Magazine April 1963 (#31) Adjustable Regulated Power Supply - Playing around with transistors? Then have: one of these ...... W1ISI 8 Diode Noise Generator - Simple test instrument to tune up converters, receivers and stuff ...... Thomas 15 Selected Circuits - Polar relay test set great for the RTTY group ...... W4WKM 18 Decibles - What they are, how to use 'em, complete with a monograph ...... K1MRK 21 Vector VFO - Simple, stable oscillator for 80 meters...
Downloads: 1,737
[texts]73 Magazine (September 1972)
73 Magazine September 1972 (#144) Plumbicon SSTV Camera - Cheapskate approach to slow scan ...... K7YZZ 10 WWVB Receiver - 60 kHz comparator receiver ...... W7LHL 16 Audio Signal Generator - A tube circuit? Yes, cigar tube ...... WA6QVQ 27 The CW Excavator - Remarkable audio filter ...... W2GOM 30 Exploring the Microwaves - Antenna and test receivers for 1296, 2300 and 3500 kHz ...... K1CLL 38 Balun Up or Balun Down - Advantages, disadvantages, and how to use ........
Downloads: 1,509
[texts]73 Magazine (July 1988)
73 Magazine July 1988 (#334) Code Test Sure Shot - Pass 5wpm without learning code! ...... KA0NTK(SK) 10 Sequential Two-Tone Encoder - Easy encoder project ...... WB7CPT 14 Novice Band Nets - Check in and upgrade, too ...... W6DDB 18 How To Improve Code Speed - Learn from others' hard work ...... W9NGP 21 Direction Finding Loop - T-hunt antenna in a can ...... WA4UZM 22 Morse Code Motivation - Pointers for teachers from a teacher ........
Downloads: 1,550
[texts]73 Magazine (April 1982)
73 Magazine April 1982 (#259) Watching the Weather - a cheap and easy conversion ...... KA9GDL 10 The Sinkhole That Ate Winter Park - hams vs. hole ...... KA4RUL 18 Operation Skywarn - tracking tornadoes with two meters ...... WB5ZAM 24 Measure Ohms with Your Calculator? - yes, and accurately, too! ...... Johnson 28 Scanning with the IC-280 ...... N7AAD 36 Detect Killer Tornadoes - use an ordinary TV set ........
Downloads: 3,987
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